Flash Programming Ok; Part 1 - Nokia NME-2A Series Troubleshooting Instructions

NME–2A
Troubleshooting Instructions

Flash Programming OK; part 1

FLASH programming OK
registration
stays on?
NO
NO
VBATT
Check X102
pins 4, 16 ?
YES
NO
N100/pin 8/XRESET
C114 OK?
+5 V after pwr on?
YES
R106 OK?
YES
Change N100
Power supp. to the logic
circuits +5 V after pwr on?
NO
Change N100
Page 6
YES
MBUS
selftest failed
OK?
YES
YES
Power
selftest failed
YES
MBUS line X100/5
+5 V after pwr on?
YES
MCU/D250/PIN67/RDX
+5 V after pwr on ?
NO
If R259 is OK
change D250
YES
Technical Documentation
NO D250/MCU/pin 3
Display:
D300/ASIC/pin 97
3
Short circuits in data
NO
Display:
data lines. data line
disconnected, VREF
unconnected
NO
YES
V250 base
YES
Check R257
R260, R258,
V250, R268,
R270
YES
Change first
2
P.A.M.S.
rstrobe
If D250 at
NO
pin 66/TXD
R263
doesn't apply
+ 5 V?
+5 V change
D250
Check
NO
R262, R263
∼ 1 V
V250, V251
D250
Original 08/97